{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:LYUQ4GVLANPGJREAH7R3IRSZRT","short_pith_number":"pith:LYUQ4GVL","canonical_record":{"source":{"id":"1808.05173","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-08-15T16:25:10Z","cross_cats_sorted":[],"title_canon_sha256":"e5f8486da77c355ef6dd971544cb31a413192f9a438cbb95cd00d64a3ca80270","abstract_canon_sha256":"8054dacbdf6e8af83bcf37e9d863430c29bb870b79b8ea8a3c327597f8cb11af"},"schema_version":"1.0"},"canonical_sha256":"5e290e1aab035e64c4803fe3b446598ce8c0e1b7bff6a5826c4367034171c7bf","source":{"kind":"arxiv","id":"1808.05173","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.05173","created_at":"2026-05-17T23:49:52Z"},{"alias_kind":"arxiv_version","alias_value":"1808.05173v1","created_at":"2026-05-17T23:49:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.05173","created_at":"2026-05-17T23:49:52Z"},{"alias_kind":"pith_short_12","alias_value":"LYUQ4GVLANPG","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"LYUQ4GVLANPGJREA","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"LYUQ4GVL","created_at":"2026-05-18T12:32:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:LYUQ4GVLANPGJREAH7R3IRSZRT","target":"record","payload":{"canonical_record":{"source":{"id":"1808.05173","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-08-15T16:25:10Z","cross_cats_sorted":[],"title_canon_sha256":"e5f8486da77c355ef6dd971544cb31a413192f9a438cbb95cd00d64a3ca80270","abstract_canon_sha256":"8054dacbdf6e8af83bcf37e9d863430c29bb870b79b8ea8a3c327597f8cb11af"},"schema_version":"1.0"},"canonical_sha256":"5e290e1aab035e64c4803fe3b446598ce8c0e1b7bff6a5826c4367034171c7bf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:49:52.637425Z","signature_b64":"Ba3ZHKxoTDkmfamWG+bHzSeTjCUib4gkb0prx1OW32XViEbv3jvFnBs6vu7vx9A3+LyEI1k9gCkqPx49iHOjDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5e290e1aab035e64c4803fe3b446598ce8c0e1b7bff6a5826c4367034171c7bf","last_reissued_at":"2026-05-17T23:49:52.636999Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:49:52.636999Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.05173","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:49:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i2GFpHE3IwgEJ+jE0RmnX/enr7fWjwUWeAHHVagYFKDjv9NAATWMv3imUdj5sy2egV6n5ZR76/sFSp7723DlDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T23:56:59.094287Z"},"content_sha256":"91c36ba369f990400815039d92ab01ce855da79fe83e57b039326bee708195df","schema_version":"1.0","event_id":"sha256:91c36ba369f990400815039d92ab01ce855da79fe83e57b039326bee708195df"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:LYUQ4GVLANPGJREAH7R3IRSZRT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Restoring self-limited growth of single-layer graphene on copper foil via backside coating","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Alexandre Felten, Emile Haye, Jean-Francois Colomer, Jean-Roch Huntzinger, Jeroen E. Scheerder, Joris Van de Vondel, Luc Henrard, Marcello Casa, Maria Sarno, Matthieu Paillet, Nicolas Reckinger, Wout Keijers","submitted_at":"2018-08-15T16:25:10Z","abstract_excerpt":"The growth of single-layer graphene (SLG) by chemical vapor deposition (CVD) on copper surfaces is very popular because of the self-limiting effect that prevents the growth of few-layer graphene (FLG). However, the reproducibility of the CVD growth of homogeneous SLG remains a major challenge, especially if one wants to avoid heavy surface treatments, monocrystalline substrates and expensive equipment to control the atmosphere inside the growth system. We demonstrate here that backside tungsten coating of copper foil allows the exclusive growth of SLG with full coverage by atmospheric pressure"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.05173","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:49:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zuRv0/sbEYC8KTAfXMaw/C97b+m2kyLcnRp6VOPlRQRFUWe1+Dq1C+MOOJj9sQu3rsZz87mS/paTFCVdSoE0AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T23:56:59.094932Z"},"content_sha256":"acf7ab50066638750e42aec2965feb4435b2497cdd1ab2a915b2612f8f6b1d91","schema_version":"1.0","event_id":"sha256:acf7ab50066638750e42aec2965feb4435b2497cdd1ab2a915b2612f8f6b1d91"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LYUQ4GVLANPGJREAH7R3IRSZRT/bundle.json","state_url":"https://pith.science/pith/LYUQ4GVLANPGJREAH7R3IRSZRT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LYUQ4GVLANPGJREAH7R3IRSZRT/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-21T23:56:59Z","links":{"resolver":"https://pith.science/pith/LYUQ4GVLANPGJREAH7R3IRSZRT","bundle":"https://pith.science/pith/LYUQ4GVLANPGJREAH7R3IRSZRT/bundle.json","state":"https://pith.science/pith/LYUQ4GVLANPGJREAH7R3IRSZRT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LYUQ4GVLANPGJREAH7R3IRSZRT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:LYUQ4GVLANPGJREAH7R3IRSZRT","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"8054dacbdf6e8af83bcf37e9d863430c29bb870b79b8ea8a3c327597f8cb11af","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-08-15T16:25:10Z","title_canon_sha256":"e5f8486da77c355ef6dd971544cb31a413192f9a438cbb95cd00d64a3ca80270"},"schema_version":"1.0","source":{"id":"1808.05173","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.05173","created_at":"2026-05-17T23:49:52Z"},{"alias_kind":"arxiv_version","alias_value":"1808.05173v1","created_at":"2026-05-17T23:49:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.05173","created_at":"2026-05-17T23:49:52Z"},{"alias_kind":"pith_short_12","alias_value":"LYUQ4GVLANPG","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"LYUQ4GVLANPGJREA","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"LYUQ4GVL","created_at":"2026-05-18T12:32:37Z"}],"graph_snapshots":[{"event_id":"sha256:acf7ab50066638750e42aec2965feb4435b2497cdd1ab2a915b2612f8f6b1d91","target":"graph","created_at":"2026-05-17T23:49:52Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The growth of single-layer graphene (SLG) by chemical vapor deposition (CVD) on copper surfaces is very popular because of the self-limiting effect that prevents the growth of few-layer graphene (FLG). However, the reproducibility of the CVD growth of homogeneous SLG remains a major challenge, especially if one wants to avoid heavy surface treatments, monocrystalline substrates and expensive equipment to control the atmosphere inside the growth system. We demonstrate here that backside tungsten coating of copper foil allows the exclusive growth of SLG with full coverage by atmospheric pressure","authors_text":"Alexandre Felten, Emile Haye, Jean-Francois Colomer, Jean-Roch Huntzinger, Jeroen E. Scheerder, Joris Van de Vondel, Luc Henrard, Marcello Casa, Maria Sarno, Matthieu Paillet, Nicolas Reckinger, Wout Keijers","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-08-15T16:25:10Z","title":"Restoring self-limited growth of single-layer graphene on copper foil via backside coating"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.05173","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:91c36ba369f990400815039d92ab01ce855da79fe83e57b039326bee708195df","target":"record","created_at":"2026-05-17T23:49:52Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"8054dacbdf6e8af83bcf37e9d863430c29bb870b79b8ea8a3c327597f8cb11af","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-08-15T16:25:10Z","title_canon_sha256":"e5f8486da77c355ef6dd971544cb31a413192f9a438cbb95cd00d64a3ca80270"},"schema_version":"1.0","source":{"id":"1808.05173","kind":"arxiv","version":1}},"canonical_sha256":"5e290e1aab035e64c4803fe3b446598ce8c0e1b7bff6a5826c4367034171c7bf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5e290e1aab035e64c4803fe3b446598ce8c0e1b7bff6a5826c4367034171c7bf","first_computed_at":"2026-05-17T23:49:52.636999Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:52.636999Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ba3ZHKxoTDkmfamWG+bHzSeTjCUib4gkb0prx1OW32XViEbv3jvFnBs6vu7vx9A3+LyEI1k9gCkqPx49iHOjDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:52.637425Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.05173","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:91c36ba369f990400815039d92ab01ce855da79fe83e57b039326bee708195df","sha256:acf7ab50066638750e42aec2965feb4435b2497cdd1ab2a915b2612f8f6b1d91"],"state_sha256":"36237e2ceca7a2c971757a0b5bec427998b52bd3d391e8b4819d8a44621dd66b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5EiFCqUczNWxO11ycKRwH5Oq/oZpxUH6qOdV7JUEnXuokHcqGuI8KB4R098+tbVwjVFIHRetFYNmPNPYXgBXBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T23:56:59.097120Z","bundle_sha256":"e7110ea94577e9e85bdb5139172bab57054ba73d065c8850de95e7314b0823b1"}}